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Differences in the intensity of light-induced fluorescence emitted by resin composites

Authors
 Bo-Ra Kim  ;  Si-Mook Kang  ;  Gyung-Min Kim  ;  Baek-Il Kim 
Citation
 PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY, Vol.12 : 114-119, 2016 
Journal Title
PHOTODIAGNOSIS AND PHOTODYNAMIC THERAPY
ISSN
 1572-1000 
Issue Date
2016
MeSH
Acrylic Resins/chemistry* ; Acrylic Resins/radiation effects* ; Colorimetry/methods* ; Composite Resins/chemistry* ; Composite Resins/radiation effects* ; Fluorescence* ; Light ; Materials Testing ; Photography, Dental/methods* ; Photometry/methods* ; Polyurethanes/chemistry* ; Polyurethanes/radiation effects* ; Radiation Dosage
Keywords
Detection ; Fluorescence ; Quantitative light-induced fluorescence technology ; Resin composites
Abstract
BACKGROUND: The aims of this study were to compare the intensities of fluorescence emitted by different resin composites as detected using quantitative light-induced fluorescence (QLF) technology, and to compare the fluorescence intensity contrast with the color contrast between a restored composite and the adjacent region of the tooth.
METHODS: Six brands of light-cured resin composites (shade A2) were investigated. The composites were used to prepare composite discs, and fill holes that had been prepared in extracted human teeth. White-light and fluorescence images of all specimens were obtained using a fluorescence camera based on QLF technology (QLF-D) and converted into 8-bit grayscale images. The fluorescence intensity of the discs as well as the fluorescence intensity contrast and the color contrast between the composite restoration and adjacent tooth region were calculated as grayscale levels.
RESULTS: The grayscale levels for the composite discs differed significantly with the brand (p<0.001): DenFil (10.84±0.35, mean±SD), Filtek Z350 (58.28±1.37), Premisa (156.94±1.58), Grandio (177.20±0.81), Charisma (207.05±0.77), and Gradia direct posterior (211.52±1.66). The difference in grayscale levels between a resin restoration and the adjacent tooth was significantly greater in fluorescence images for each brand than in white-light images, except for the Filtek Z350 (p<0.05). However, the Filtek Z350 restoration was distinguishable from the adjacent tooth in a fluorescence image.
CONCLUSIONS: The intensities of fluorescence detected from the resin composites varied. The differences between the composite and adjacent tooth were greater for the fluorescence intensity contrast than for the colors observed in the white-light images.
Full Text
http://www.sciencedirect.com/science/article/pii/S1572100016300059
DOI
10.1016/j.pdpdt.2016.01.005
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Preventive Dentistry and Public Oral Health (예방치과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Others (기타) > 1. Journal Papers
Yonsei Authors
Kang, Si-Mook(강시묵) ORCID logo https://orcid.org/0000-0003-2341-3636
Kim, Baek Il(김백일) ORCID logo https://orcid.org/0000-0001-8234-2327
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/146321
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